NO. 007Reactive Nonmetal

N

Nitrogen

Nitrogen makes up most of Earth's atmosphere and is essential for life.

Crystal Structure

Hexagonal close-packed (hcp)

Atomic Mass14.007 u

Density0.0012506 g/cm³

Melting Point63.15 K

Boiling Point77.36 K

Atomic Radius56 pm

Electronegativity3.04

Ionization Energy1402 kJ/mol

Electron Affinity-7 kJ/mol

Bonding TypeCovalent

Oxidation States-3, 3, 5

Acid/BaseNeutral

ReactivityLow

Electron Configuration

[He] 2s2 2p3

Discovered ByDaniel Rutherford

Year1772

Known Isotopes

Nitrogen-14Nitrogen-15